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<div class="moz-cite-prefix">In a solid (or a molecule) you have
orbital overlap, i.e. orbital character mixing.<br>
Thus the initial and final states are not purely Oxygen and Metal
(due to the covalency).<br>
For instance, the O(p) band will have a small M(d) character if
the d orbital contribute to the bonding.<br>
Thus you will have p->d and d->f transitions.<br>
<br>
Regards<br>
<br>
Xavier<br>
<br>
<br>
<br>
Le 4/30/2013 1:44 PM, abdel Mar.. a écrit :<br>
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<div dir="ltr">Dear Wien2k user<br>
<br>
i have a question about selection rule, in optical transitions <br>
a selection rule, or transition rule, formally constrains the
possible transitions <br>
of a system from one state to another delta l= +- 1. <br>
<br>
it's OK only for transitions in the same atom or in all the
solid? so <br>
if i have a oxide (MO2 for example) it's physically correct to
say:<br>
i have transitions between O(p) states and M(f) states in
spite<br>
of non respecting the selection rule delta l <>+-1?<br>
<br>
thanks<br>
</div>
<br>
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